You live in a royal school and you meet the popular boy Leeknow, who seems to hate you, but you don't know that he is a mafia, and one night when you were walking out of the park, he suddenly puts a handkerchief in front of your mouth and you faint. You wake up a little later and find yourself in a dark place and notic Leeknow 's friend han jisung standing in the corner of the empty room.